< Topic >Offers the illuminating which solves the problem of exhaust heat of the plant factory which the LED plant rearing light was disposed is closed airtight.SolutionsInside the building, the cultivation shelf in order to cultivate the plant is provided, LED plant rearing light 20 is laid out in the upper part of the said cultivation shelf, light of the said LED plant rearing light 20 is irradiated to the plant on the cultivation shelf. LED plant rearing light 20 is long, it consists the light-emitting diode which is installed in the LED substrate and the said LED substrate which facilities make shift the base substance and the said base substance of the condition which consists of the flexible pipe of air. Liquid wraparound path 52 is provided, the radiator 62 which is laid out in the outside is concatenated to the said liquid wraparound path 52, LED plant rearing light 20 is cooled with the chilled water which was cooled by radiator 62, exoergism of LED plant rearing light 20 is suppressed.< Choice figure >Drawing 2【課題】LED植物育成灯を配備した密閉された植物工場の排熱の問題を解決した照明装置を提供する。【解決手段】建物の内部に、植物を栽培するための栽培棚を設け、該栽培棚の上方にLED植物育成灯20を配置し、該LED植物育成灯20の光を栽培棚上の植物に照射する。LED植物育成灯20は中空のパイプから成る細長状の基体と、該基体に固設されたLED基板と、該LED基板に取り付けられた発光ダイオードとで構成される。液体循環路52を設け、該液体循環路52に、屋外に配置される放熱器62を連結し、放熱器62によって冷却された冷却水でLED植物育成灯20を冷却し、LED植物育成灯20の発熱を抑制する。【選択図】図2
